| 摘要 |
PURPOSE:To eliminate the need of an intermediate file by providing a sub-routine group reading data required for generating output data on a signal processing circuit in a final stage from an input file. CONSTITUTION:Input data is digital-filtered by the input file 11, an output file 13 and filters 211 and 212. Time sequential data D11-D15 are stored in the input file 11. The sub-routine group 14a identifies data D41 stored in the output file 13 from data D31 obtained by digital-filtering output data D21-D23 in the filter 21 by the output of the filter 212. The sub-routine group 14a sequentially reads data D11-D15 from the file 11, filters them by the filter 21 and filters the outputs D21-D23 by the filter 212. Thus, the intermediate file becomes unnecessary since input data are filtered while they are being read. |
